Self-lowering journal-jack.



M, ROSEN.

SELF LOWERINGJOURNALJAC'K.

APPLmATmN FILED oc,1o,1917.

'. ,2?@5 5?@ n lPatented Aug. 20, 19H5,

A o@ j 2 SHEETS-SHEET l. War/f.. I3

M. ROSEN,

SELF LUWEHING JOURNAL mex.

APPLICATEON FILED OCT.

" SHEETSvSHEEY 2.

liti

MEYER ROSEN; F BLUOMINGTN, ILLNOIS.

SELF-LOINERNG JOURNAL-JACK.

Speccatioii ofetters Patent.

lateiitetl Aug. 2e. f ills.

Japplication filed october 1G, 1917. Serial No. 195,689.

To all whom t may concern.'

Be it known that l, MEYER ROSEN, a citizen of the UnitedStates, and aresident of Bloomington, in the county of McLean and frita-te ofIllinois. have invented an improvement Ain Self Lowering Journal- Jacks,of which the following description, in connection with the accompanyingdrawings, is a spcciiication, like characters on the drawingsrepresenting like parts.

yllhis invention relates to self -lowering journal jacks. A ln orderthat the principle of the -invention may be readily understood, l havedisclosed a single embodiment thereof in the accompanying drawings,wherein- Figure l is a transverse section taken through the iaclr;

Fig. 2 is a vertical transverse section upon the line2-2 of Fig. l;

3 is a vertical transverse section upon the line 3-3 of Fig. 2;

Fig. 4 is a detail iii section upon the lino i-- of Fig. l; and

Fig. 5 is a detail upon the line 5*-5 of Fig. 1.

The jack one embodiment. whereof is shown in the accompanying drawings,is adapted for any use to which Jacks are or l may be applied, butparticularly to lifting heavy loads, such for example as the drivingwheels of engines. used in connection with automobiles and for numerousother purposes not necessary to enumerate.

Referring more particularly to the drawings, l have therein representedthe casing of the jack as composed of inner and outer members 1, 2, theinner member l being preferably composed of a single cast part havingahollow base portion 8. Said ineinberY l in transverse section isrectangular, as clearly shown in Fig. 1,' thus forming four verticalwalls, 4, 5, G, 7, all of which are continuous, with the exception ofthe wall 7 which, as shown at the left in Fig. i, is formed with averticalv slot or opening to accommodate the thickened portion 8 of theadjacent Wall of the member 2, said thickened portion 8 havingintegrally formed' therewith teeth 9 in vertical alineinent andconstituting a rack. l provide suitable gearing, one member of whichmeshes with said rack, thereby to ciect the lifting of the lt may,however, be

member 2 of the casing'. For this purpose l provide a shaft 10 having asquared outer end l1 to which a crank or other driving member may beapplied. The shaft l) which has a reduced inner end is mounted forrotation iii a bearing l2 integral with which, most clearly illustratedin Fig. ly

is a yoke 13 having opposite lugs 14, l5 f respectively mounted inv aninwardly er;u tending web 16 of the wall il, and the wall 6 of the innermember l of the casing. The shaft l0 extends through elongated slots l?,18 of the casing members l, 2, thus permit ting rocking movement of theshaft l0 in a vertical plane about the lugs ll, l5 of the yoke aspivots.

l provide *thev shaft l0 with a driving member thatvis adapted tobethrown into or outfof gear with the parts to be driven by the swingingmovement of the said shaft 10. For thispurpose and in order to secure arelatively' great leverage,l have secured upon the inner end of theshaft l0 a dish;

like member 19 having' upon the inner face thereof aspiral cani 20 mostclearly shown in Fig. t. Theadjacent ends 2l, 22 of the spiral arespaced apart the distance of one tooth of the gear 23 fast upon thetransverse shaft 2li, whereby when the shaft 'l0 is in the positionshown inlligs. l and 2, the rotation of said shaft eiiects the turningmovement of the gear and consequently of the shaft 24. The gear 23 isprovided with teeth 24 which are shaped somewhat like those of a worinWlieelg that is, they are substantially are shaped.

Fast upon the shaft 24.- which carries the ,gear 23 is a gear 25'meshingwith a similar gear 26 upon the horizontal shaft 2?, which has fastthereon a gear 28 meshing with the teeth '9 upon the inner face of themember 2 of the casing, whereby rotation of said shaft'lO through thegears 20, 23, 25, 26, E38 effects lifting movement of said member 2 ofthe casing. y

The gear upon the shaft 24 also meshes with and drives the gear 29 fast-upon the shaft .30 extending transversely of the inner member l of thecasing and mounted in the side walls thereof. Also fast on the shaft 30is a gear 3l meshing with `a gear 32.-upon the horizontal shaft'v33likewise mounted in the inner member l of the casing. Thus, in therotation of the shaft 1() in the elevation of Leraars ing said membersto elect the lifting move! nient7 and including a spiral cam, a gear`wheel having arc-shaped teeth, each tooth having a concave/d tace, abralie for said gearing, and means operatively connected to said braketo move said cam out of meshing relation7 thereby to edect returnmovement of the casing members.

A jaclr comprisirg a casing composed ci, separable members, gearing torseparating said members to effect the lifting movement, said gearingincluding .a ratchet, a surrounding memberhaving paivls to engage saidratchet,` a brake surrounding said members, and means to release saidbrake.

7. A jack comprising a casing composed of separable members, gearingvforseparat ing said members to effect the lifting movement and includingmeans to prevent back movement of said gearing, and a screvv to releasesaid neans preventing bac-lr movement oir' the gear-inox.

d. Il jack comprising a casing composed er" separable members, gearingfor separating said members to eiiect the lifting movement and includinga ratchet,-a dish having parvis to engage said ratchet, a brake band toengage said disk, and a screw to release vsaid brake band.

9. el jack comprising a casing composed of separable members, gearingfor separat- .ing said members to edn-zot the lifting movement andincluding a ratchet, a disk having paivls to engage said ratchet, abrake band 'to engage said disk, a screw to release said hralre band,and means to disengage said gearing.

lll. A jaclr comprising separable members, one of which is provided witha rack7 gearing to separate said members including a gear constantlymeshing with said rack, a driving member mounted for movement in and ontor' driving relation with said gearing and including a disk having onelateral tace thereof formed a spiral cam, and a gear Wheel having arcshaped teeth engaging. With said spiral cam and' screw; means to eilectsaid movement in and out ot d iving relation.

lL'. A jack comprisingiy separable@ ineinbers, one of which providedWitha rack,

'gearing to separate said members and including a gear constantlyvmeshing with said rack, said gearing also including a dislililt'c meiber having on one face a spiral cani toi-mation 20, a gear Wheel havingarc shaped teeth engaging with said spiral canin and presentingsubstantially parallel faces respectivelyv concave and convex and meansto swing said disk-lire member into and out of meshing relation withsaid gear wheel.

l2. A jack composed of separable members. one of which is provided witha rack, gearing to separate said members and iucluding a gear meshingwith said rack, a driving member for said gear having swinging.uioven'ient into active and non-active positions, and a screw forimparting such swinging movement to said driving member.

.13. jack having inner and outer casing members, the latter beingprovided with a rack, a train of gearing having a member meshing withsaid rack to lift the outer ing member7 said gearing including separablemembers, and a screw carried with the casing and adapted to eiiect theseparation oli' said members, thereby to permit seltloivering of thejack.

14. A jat-lr lniving-inner and outer casing members, the latter beingprovided with a rack, a train of gearing having :L member constantl)Ymeshing `with said rack to litt the outer casing member, said gearingincluding two separable gears, means carried by the casing to etectengagement and disengagement between said separable gears, thereby toeiiect self-lowering of the jack, and a brake operatively connected tosaid means to effect engagement and disengagement.

l5. A jack comprising members l.J 2, the former having' a rack 9,gearing including a gear constantly meshing with said rack land alsoincluding a cam 20, and screw means to disengage said cam from thegearmg.

16. A jack comprising inembersl7 2, the former having a rack 9, gearingmeshing with said rack and including a cam 20, a movable member carryingsaid cam, and screw 44 operativelyv connected to said member and adaptedto shift the saine.

17. jack comprising members l, 2, the former having` a re la 9, gearingmeshing with said rack and including a cam QG, a ratchet in drivingrelation with said gearing7 pawls 235, a disk carrying said pawls, abrake to engage said dislc and a member to eil-'ect disengagement ofsaid cam Q from the gearing and engagement of said b 'aire with saiddisk.

lS. ifi jack comprising members l, 2, the former having a rack 9,ygearing meshing vwith said rack and including a cam 20, a ratchet 34 indriving relation with said gearing, pawls 85, a disk carrying saidpawls, and surrtninding said ratchet, a brake surrounding and adapted toengage said dish, and means to release said brake.

i9. A jack comprising inembe-rs l, 2; the jt'ormer having a rack 9,gearing including a gear constantly .meshing with said rack and alsoincluding a cam 20, a ratchet Bel in driving relation with said gearing7pavvls 35,

